()(54 ANATOMY OF VERTEBRATES. 



is a longitudinal thick oblong ridge or lobe, fig. 520, r, three 

 inches and a half in length, and eight lines in basal thickness : 

 the thick rounded free border of each lobe inclines downwards. 

 A narrow ridge commences in the median space of the ' dorsum 

 glandis,' which increases in height as it advances forwards, and 

 then subsides two inches from the border of the terminal or apical 

 fossa. The projecting border of this fossa describes a compressed 

 oval, and is attached to the pedunculated appendage, fig. 521, a, 

 by a process, like a fraenum, continued upon the middle line of 

 both the upper and under surfaces, ib. /, of the thick peduncle : 

 the fossa between this peduncle and the free external border is 

 two inches in depth. The stem, /, of the terminal expanded 

 discoid appendage is subcompressed with an oval section : the 

 disc is ovate, one inch eight lines long by one inch across its 

 broader inferior part, where it extends farthest from the support- 

 ing stem. The urethra, u, terminates in the middle line of the 



o 



disc between its middle and upper third. 



In the Sumatran Tapir the base of the glans has an upper 

 lobe as well as one on each side, beyond which it is continued 

 forward contracting, but terminates in a truncate surface on 

 the middle of which the urethra opens. In the American Tapir 

 the orifice is nearer the lower margin of the disc. The testes 

 are inguinal, in a slightly indurated sessile scrotum, about 6 inches 

 below the vent. The accessory glands resemble those of the 

 Rhinoceros. 



The testes were abdominal, below or beyond the kidneys, in 

 the Hyrax (H. capeusis) dissected by me: the vasa deferentia are 

 convoluted, like a second epididymis, behind the urinary bladder : 

 they terminate near to, but distinct from, the ducts of the vesi- 

 cular glands, at the lower end of the unusually elongated mus- 

 cular tract of the urethra: the vesicular glands extend on each 

 side of this canal, their closed ends just reaching the bladder. 

 Two prostates, of a tubular structure, are near the duct-ends of 

 the vesicular. Two small flattened Cowperian glands communi- 

 cate by long ducts with the wide cavity of the bulb of the ure- 

 thra. The penis is bent abruptly backward, and the glans has 

 a truncate termination. Besides the ' erectores ' and i accele- 

 ratores,' there is a pair of f levatores,' arising from the symphysis 

 pubis, and terminating by a single tendon, as in the Rhino- 

 ceros. 



In the Horse the scrotum, fig. 522, a, is suspended between the 

 thisrhs at a distance of about nine inches beneath the anus, whence 



